To help, well list out some of the better options for players looking to dip their toes into Rat typal in Commander
They are all being "hosted" by the merfolk, known as the River Heralds, and they now stand before Matzalantli, the great door
Shorikai, Genesis Engine is such a winner in terms of concept alone, but thankfully for us it's also a powerhouse of a card: this is an ultra-reliable value engine sitting in our command zone, drawing us cards, filling our graveyard for reanimation, making pilots to crew our vehicles, all while not being a creature unless we want it to be so it's exceptionally hard for opponents to remove it
This ensures an easy and accurate fit for your cards
Its also much more viable to try and hold the Monarch/Initiative in 1v1, whereas in multiplayer youre often just letting the next player snatch it off you and taking it back on your turn to get the trigger